Shock-absorbing pulley.



T. H. MILLER. SHOCK ABSORBING PULLEY. APPLICATION FILED 001221, woe,

Patented Jan. 17, 1911.

' INVENTOR WITNESSES:

. complish this result can be best- .or end c.

UntTnn STATES PATENT OFFICE. I

THEODORE H. MILLER, OF POUGHKEEISIE, NEW YORK, ASSIGNOR TO THE DE LAVALSEPARATOR COMPANY, A CORPORATION OF NEW JERSEY.

SHOCK-ABSORBING- PULLEY.

Application filed October 21, 1909. Serial 110.523 ,833.

Specification of Letters Patent. Patented J an. 17, 1911.

To all whom it may concern."

Be it known that I, THEODORE H. MILLER, a citizen of the United States,residing at loughkeepsie, county'of Dutchess, vand State of New York,have invented a new and useful In'lproveinent in Shock-AbsorbingPulleys, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings,'which form'a part ofthis specification.-

My invention is particularly designed for use with a gas engine wherethe explosion has a tendency to vary the impulse or drive.

If the pulley be fixedly attached to the shaft driven by such an engineit will have a'tendency to produce irregularity of movement and ajarring. When, as is the case here, I desire. to drive a centrifugalseparator .this condition should be avoided.

It is the object of my invention to correct this defect. The mechanismby which I acdescribed by reference to the embodiments of my inventionshown in the accompanying drawings, in which Figure 1 is a sectionalview of an apparatus showing one embodiment of my invention. Fig. 2 is asectional view of an appz-iratus showing another embodiment of myinvention.

Referring to Fig. 1. a is the shaft driven by a gas engine, not shown.This shaft has the enlarged portion 7) and theenlarged head (l is theidle pulley. e is the driving pulley in spider form, havingthe webs f.This pulley is loosely mounted on the shaft 0. It is connected to 'bedriven by the shaft in the following manner Coiled around the enlargedportion Z) of the shaft, a is the spring g, one end of this springentersan orifice h in one of the webs f and the other end of the spring entersan orifice 2' in the collar a loose on the-shaft a. Milled on the sideof the collar is the ratchet cam 0. 79 is a spring pawl mounted on thehead and cooperating with the ratchet cam 0. j is a sleeve surroundingthe spring 9. This sleeve is secured to the head by the set screw is.

. The construction shown inFig. 2 is quite similar to that shown inFig. 1. The shaft (1, however, does not have a head 0 as in Fig.

1, but the sleeve 7' has an end piece Z which, when the sleeve is inposition, fits over the 'end of the shaft and on which is secured thepaw'l p, and forms ahead for the shaft. In this-eonstruction the sleeve7' is secured to the enlarged portion Z) of the shaft (1 by set screw m.

IVhen. the shaft is operated by thegas engine, the shaft a and drivingpulley e are operated with regularity and all shock is absorbed. IVhenthe gas engine is stopped with the belt upon the driving pulley andqaerating, say, a separator. the driving pulley through the ratchet andpawl connection can' continue to rotate until its momentum ceases.

Having now fully described my invention, what I claim and desire toprotect by Letters Patent is: 1. In combination, a driving shaft, apulley loose on said shaft, a ratchet and pawl driving connection forsaid shaft, and a spring connection between said pulley and said ratchetand pawl driving connection to communicate the movement of the shaft tothe pulley. 2. In combination, a driving shaft, a pulley loose on saidshaft, a driving connection for said shaft, operative to rotate theshaft, and a spring connection betweensaid pulley and said shaft drivingconnection to communicate said movement to the pulley.

3. In combination, a driving shaft, a pulley having an orifice, a springsurrounding a portion of said shaft, a collar loose on said shaft, saidspring being connected with said collar and entering said pulleyorifice,

and a ratchet and pawl connection between said collar and shaft.

4. In combination,-a driving shaft, a pulley having an orifice, a springsurrounding a portion of said shaft, said spring entering said pulleyorifice, a connection between said spring and shaft,and a sleevesurrounding said spring, said sleeve being secured to said shaft.

5. In combination, a drivingshaffla pulley loosely mounted on saidshaft, said shaft beyond said pulley being enlarged, a springsurrounding said enlarged portion, said. spring forming a connectionbetween said "pulley andgshaft. r

6. In combination, a driving shaft, 2. pulvley loosely mounted on saidshaft, said shaft beyond said pulley having a head, a spring surroundingsaid shaft,.said spring forming a connection between said pulley andshaft.

7. In combination, a driving shaft, a pill;

beyond said pulley having ley loosely mounted on said shaft, said shaftbeyond said pulley having an enlarged portion and a head, a springsurrounding said enlarged portion, said spring forming a connectionbetween said pulley and shaft;

' 8. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft beyond said pulley being enlarged, a springsurrounding said enlarged portion, said spring .forming .a connectionbetween said pulley and shaft, a sleeve surrounding sai spring andsecured to said shaft.

9. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft beyond said pulley having a head, a spring surroundingsaid. shaft, said spring form-v ing a connection between said pulley andshaft, and a sleeve surrounding said spring and secured to said shaft.

10. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft an enlarged portion and a head, a spring surroundingsaid enlarged portion, said spring forming a connection between saidpulley and head, and a sleeve surrounding said spring and secured' tosaid shaft.

11. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said pulley having an orifice, a head," a collar loose on saidshaft having an orifice, a spring surrounding saidshaft, said springentering the pulley and collar 0rifices,'-and a ratchet and pawlconnection between said head and collar.

12. In combination, a driving shaft, a-pulley loosely'f mounted on saidshaft, said pulley having an orifice, a head, a collar loose .on saidshaft, there being an orifice in said collar, a spring. surrounding saidshaft. said spring entering the pulley and collar orifices, a sleevesurroundingsaid spring, said sleeve being secured to said shaft, and aratchet and pawl connection between said head and orifice in saidcollar,

collar;

13. In combination, ley loosely mounted onsaid shaft, saidpulley havingan'orifice, said shaft, beyond said pulley, having an enlarged portion,a head a collar loose on said shaft, there being' an a springsurrounding the enlarged portion of said shaft, said spring entering thepulley orifice and collar orifices, and ratchet and pawl connection behead.

driving shaft, a pulshaft, said pultween said collar and 14. Incomb1nat1on,a

'pulley each havingan orifice,

a driving shaft, a pulley having an orifice, said shaft, beyond saidpulley, having an enlarged portion, said shaft having a head, a collarloose on sai shaft, there being an orifice in said collar, a'springsurrounding the enlarged portion of said shaft, said spring entering thepulley orifice and collar orifice, and a sleeve surrounding said spring,said sleeve being secured to said shaft, and a ratchet and pawlconnection between saidcollar and head.

. 15. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft having a head, a collar'loose on said shaft, a springforming a. drivingconnection between said pulley and said collar, andloose connection between said head and said collar.

16. In combination, adriving shaft, a pulley loosely mounted on saidshaft, said shaft having a head, a collar loose on said shaft, 2.:spring surrounding said shaft and forming a driving connection betweensaid pulley and said collar, a sleeve surrounding said spring, and looseconnection between said collar and said head.

17. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft having a head, a collar loose on said shaft, a spring.forming a driving connection between said pulley and said'collar, saidcollar and pulley each having an orifice, said spring entering saidorifices, and a ratchet and pawl'connection between said head andcollar. Y

'18. In combination, a driving shaft, a pulley loosely mounted on saidshaft, said shaft having a head, a collar loose on said shaft, a springsurrounding said shaft between said pulley and said collar, said collarand saidspring entering said orifices, and a sleeve surrounding saidspring and secured to said shaft,

.and ratchet and pawl connections between said head and collar.

19. In combination, ley, a. driven memlper, and spring connectionbetween said pulley and driven member for directly drivingthe latter,and loose con-- nection between said driven member and said shaft fordriving said shaft. n In testimony of which invention, I have hereuntoset; my hand, at Poughkeepsie, N. Y., on this 11th day of Oct., 1909. I

THEODORE H. MILLER.

' Witnesses:

FRANK R. Coons, JOHN B. Grimm.

a driving shaft, a p ul-

